Gelatin Microsphere for Cartilage Tissue Engineering: Current and Future Strategies

The gelatin microsphere (GM) provides an attractive option for tissue engineering due to its versatility, as reported by various studies. This review presents the history, characteristics of, and the multiple approaches to, the production of GM, and in particular, the water in oil emulsification technique. Thereafter, the application of GM as a drug delivery system for cartilage diseases is introduced. The review then focusses on the emerging application of GM as a carrier for cells and biologics, and biologics delivery within a cartilage construct. The influence of GM on chondrocytes in terms of promoting chondrocyte proliferation and chondrogenic differentiation is highlighted. Furthermore, GM seeded with cells has been shown to have a high tendency to form aggregates; hence the concept of using GM seeded with cells as the building block for the formation of a complex tissue construct. Despite the advancement in GM research, some issues must still be addressed, particularly the improvement of GM’s ability to home to defect sites. As such, the strategy of intraarticular injection of GM seeded with antibody-coated cells is proposed. By addressing this in future studies, a better-targeted delivery system, that would result in more effective intervention, can be achieved.

Microsphere: A Unique and Useful Drug Delivery System

Microsphere is one the novel technology that is used to deliver the drug to it targeted site. Microsphere they are micro particle in size. They are of natural and synthetic one. There are various approaches in delivering a therapeutic substance to the target site in a sustained controlled release fashion. For preparation of microsphere protein physiochemical property to be optimized this include optimal pH, protein stochiometry and protein concentration. Some of the important microsphere technology includes Ceformin microsphere technology Ceformin EI, Ceformin TI, Ceformin EA/CR, Silk microsphere and gelatin microsphere. Microsphere drug delivery system has gained enormous attention due to its wide range of application as it covers targeting the drug to particular site to imaging and helping the diagnostic features. Microsphere is excellent polymer used for buccal delivery. It is also used to deliver pacilitaxel at the tumor site. In the present study valuable and selective information on microsphere is enlightened with its important applications which will be beneficial for further newer drug development.

Microsphere: A Unique and Useful Drug Delivery System

Microsphere is one the novel technology that is used to deliver the drug to it targeted site. Microsphere they are micro particle in size. They are of natural and synthetic one. There are various approaches in delivering a therapeutic substance to the target site in a sustained controlled release fashion. For preparation of microsphere protein physiochemical property to be optimized this include optimal pH, protein stochiometry and protein concentration. Some of the important microsphere technology includes Ceformin microsphere technology Ceformin EI, Ceformin TI, Ceformin EA/CR, Silk microsphere and gelatin microsphere. Microsphere drug delivery system has gained enormous attention due to its wide range of application as it covers targeting the drug to particular site to imaging and helping the diagnostic features. Microsphere is excellent polymer used for buccal delivery. It is also used to deliver pacilitaxel at the tumor site. In the present study valuable and selective information on microsphere is enlightened with its important applications which will be beneficial for further newer drug development.

3D Culture of MSCs on a Gelatin Microsphere in a Dynamic Culture System Enhances Chondrogenesis

Recent advancement in cartilage tissue engineering has explored the potential of 3D culture to mimic the in vivo environment of human cartilaginous tissue. Three-dimensional culture using microspheres was described to play a role in driving the differentiation of mesenchymal stem cells to chondrocyte lineage. However, factors such as mechanical agitation on cell chondrogenesis during culture on the microspheres has yet to be elucidated. In this study, we compared the 2D and 3D culture of bone-marrow-derived mesenchymal stem cells (BMSCs) on gelatin microspheres (GMs) in terms of MSC stemness properties, immune-phenotype, multilineage differentiation properties, and proliferation rate. Then, to study the effect of mechanical agitation on chondrogenic differentiation in 3D culture, we cultured BMSCs on GM (BMSCs-GM) in either static or dynamic bioreactor system with two different mediums, i.e., F12: DMEM (1:1) + 10% FBS (FD) and chondrogenic induction medium (CIM). Our results show that BMSCs attached to the GM surface and remained viable in 3D culture. BMSCs-GM proliferated faster and displayed higher stemness properties than BMSCs on a tissue culture plate (BMSCs-TCP). GMs also enhanced the efficiency of in-vitro chondrogenesis of BMSCs, especially in a dynamic culture with higher cell proliferation, RNA expression, and protein expression compared to that in a static culture. To conclude, our results indicate that the 3D culture of BMSCs on gelatin microsphere was superior to 2D culture on a standard tissue culture plate. Furthermore, culturing BMSCs on GM in dynamic culture conditions enhanced their chondrogenic differentiation.